/*
 * This file is part of the Sx Framework Library.
 * 
 * Copyright (C) 2013 University of Colorado Denver
 * <min.choi@ucdenver.edu> <shane.transue@ucdenver.edu>
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy 
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
 * copies of the Software, and to permit persons to whom the Software is 
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in 
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
 * DEALINGS IN THE SOFTWARE.
 */
#include <sxTimer.h>

/* Win32 API Timer Implementation */
#ifdef _WIN32
#include <windows.h>

LARGE_INTEGER startCount;

void Sx::Util::Timer::start() {
    QueryPerformanceCounter(&startCount);
}

void Sx::Util::Timer::stop(float& elapsedTime) {
    LARGE_INTEGER endCount;
    LARGE_INTEGER freq;
    long deltaTicks = 0l;
    float resultElapsedTime = 0.0f;

    QueryPerformanceCounter(&endCount);
    QueryPerformanceFrequency(&freq);

    deltaTicks = static_cast<long>((endCount.QuadPart - startCount.QuadPart));
    resultElapsedTime = (float)((float)deltaTicks/(float)freq.QuadPart);
    elapsedTime = resultElapsedTime;
}

#else

void Sx::Util::Timer::start() {}
void Sx::Util::Timer::stop(float& elapsedTime) { elapsedTime = 0.0f; }

#endif
